MESON Chess Problem Database

Problem Display
PID: 54993 (3K4/p2p1p2/kB2P2Q/N5R1/8/8/2N3p1/1R6 w - - 0 1)

Umanov, Vadim

3rd Comm., Die Schwalbe, 1999/I

3K4/p2p1p2/kB2P2Q/N5R1/8/8/2N3p1/1R6

#2

8 + 5

23 Die Schwalbe 2003

SOLUTION

  • SOUND
  • Tries
    • 1.exd7?
      • threat
        • 2.Sb4#
      • 1...axb6
        • 2.Qxb6#
      • 1...f5
        • 2.Bc7#
      • 1...f6!
    • 1.exf7?
      • threat
        • 2.Sb4#
      • 1...axb6
        • 2.Qxb6#
      • 1...d5
        • 2.Bc7#
      • 1...d6!
  • Keys
    • 1.Bc7!
      • threat
        • 2.Sb4#
      • 1...d5
        • 2.exf7#
      • 1...f5
        • 2.exd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • P(F);XP(d)
      • Threat
        • S(B)
      • Vars
        • P(c);OGATE,P_SPINP(c),XB(E)::QAR1(G),XP(c)
        • P(e);N_GUARD::QAR(G)+B(E)
      • Refutation
        • P(e);
    • Try
      • P(F);XP(e)
      • Threat
        • S(B)
      • Vars
        • P(c);OGATE,P_SPINP(c),XB(E)::QAR1(G),XP(c)
        • P(d);N_GUARD::QAR(G)+B(E)
      • Refutation
        • P(d);
  • Actual
    • B(E);
    • Threat
      • S(B)
    • Vars
      • P(d);N_GUARD::QAR(G)+P(F),XP(e)
      • P(e);N_GUARD::QAR(G)+P(F),XP(d)
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